Attachment for looms



April 21, 1925.

M. A. GOLDMAN ATTACHMENT FOR LOOMS Filed Nov. 13' 1 24 2 Sheets-Sheet IINI/EIVTOR mu/r/cs fl. GOLD/WAN A ril 21', 1925. 1,534,033

- M. A. GOLDMAN ATTACHMENT FOR LOOMS Filed Nov. 13. 1924 '2 Sheets-Sheet2 INVENTOR UR/(f H. (OlDMA/V Z l I 4 TTORNEY Patented Apr. 21, 1925,

Units sr'rss arnr or MAURICE A. GOLDMAN, OF MILFORD. NE'W HAMPSHIRE,ASSIGNOR TO MILFORD TEX- lILE CORPORATION. OF MILFORD, NEW HAMPSHIRE, ACORPORATION OF NEW YORK. 1

ATTACHMENT FOR Looivrs.

Application filed November 13, 1924. Serial No. 749,690.

To all whom it may concern:

Be it known that I, MAURICE A. GoLnMAN, a citizen of the United States,residing at Milford, New I ampshire, have invented a new and usefulImprovement in Attaclr ments for Looms, of which the following is aspecification.

My invention relates to the manufacture of linen and jute fabrics andhas reference more particularly to an attachment for a loom which isused to weave two or more widths of narrow cloth at one time.

In the manufacture of jute or linen materials intended for paddings, forsome classes of bags, and for cutting up purposes generally, the qualityor firmness of the selvage of the fabric is a matter of littleimportance, and where the material is so loosely woven and is designedfor cutting up purposes, it is absolutely necessary to makesomeprovision atthe edges of each width, which will prevent the warp threadsfrom working loose at these points. Such provision is termed the centerselvage.

Briefly stated, this selvage consists of three threadsarranged with thewarp, two thereof form plain cloth continually, while a third, calledthe doupe or leno, binds the whole firmly together; The lone crossesover the two warp threads, but drops below the weft every pick, first atone side and then at the other. When the leno is up at one side, thewarp thread at the same side is under the weft. To permit of thistwisting action, it is clear thatall three threads must pass through thesame split of the reed. Therefore, it is necessary to leave suflicientspace empty in the reed between each pair of cloths so as to form weftfringe at these places, i, e., cutting divisions between. the cloths.

Various complicated and expensive dcvices have been devised for workingcenter and side selvagcs, but none have been genorally adopted in thejute and linen weaving industries.

with the above in mind, it is the principal object of my invention toprovide an improved center-selva-ge attachment for looms, which isextremely simple in construction and which may be applied to any loomused for weaving a plurality of widths of narrow cloth at the same time,

The invention is illustratively exemplified in the accompanyingdrawings, in which Figure 1 1s a perspective view of my improvedcenter-selvage attachment showing the arrangement of threads and asection of the woven material; Figure 2 is a substantially sectionalview showing the relative positions of the parts and threads during oneextreme ope 'ation of the loom; and Fi ure 3 is a similar View showingthe same parts in the other extreme operation.

Referring to drawings, and ll designate the front and rear harnesses,respectively, of an ordinary draper 100m, both harnesses comprising aplurality of heddles 12 provided with eyes 13. The harnesses are raisedand lowered alternately in the usual manner by suita le mechanism, notshown. The arrangement of the warp threads 14 comprises the ordinarylayout in which alternate threads are received by the eyes of the frontand back heddles. The weft thread 15 unwinds from a reciproeating bobbin16 traveling in the space provided by the shedding of the warp threads14- at the front of the front harness 10. The Warp threads 13 arereleased from a drum 17 at the rear of the loom and are arranged over aroller 18 and alternately between parallcl rods 19 before entering theeyes of the front and rear heddles 12. A suitable comb 20 is operativelysituated at the usual position in front of the front harness 10 and isprovided with a reed 21 from which several members have been omitted toprovide wide splits 22 at predetermined intervals depending of courseupon the widths of narrow cloth to be woven.

The mechanism and arrangement of threads just briefly described istypical of the draper loom and according to the pres ent inventionpractically no change eon templated in mechanism and only a' very slightrearrangement of certain warp threads require attention. Assuming thatthe loom is set up to weave more than one width of cloth at one time,and as explained in the foregoing, three threads are selected from eachedge of a width and pass through a single split 22 of the reed. Asillustrated in Figure 1, there are two groups of such threads shown, onethereoffor each edge of adjacent widths and for the sake of brevity,

since all groups are manipulated in the same manner, but one group willbe described. 7

From left to right, the selvage threads are designated A, B, C, and A,B, and C, respectively, C and C are carried by the rear harness 11 andthreads A and A, here'- after referred to as the leno or doupe threads,are also carried by the rear harness, one heddle to the left of theheddles carrying C and C. Threads B and B are disposed between the lenothreads C, G and A, A respectively, and are'carried by the heddles ofthe front harness.

The attachment, comprising the present invention, fordrawing the lenothreadsA, A over the threads B, B, C, C and below the path of travel ofthe bobbin 16, consists of a Y-shaped length offlexible link chain 23,the lower end of the stem portion thereof being suitably attached to thelower bar 2% of the front harness 10, and the free ends of the'Y-shapedportions being provided with rings or eyes through which 1 the lenothreads A, and A are threaded.

It is preferable in a construction of this kind, when set tohandle aleno thread, to

- provide a separate drum from which the thread is fed toward theharnesses.

In Figure 2, such an auxiliary drum 26 is shown, and in practice it isdesigned to offer less resistance totheunwinding thread than thatoffered by the large warp drum 17. ;The operation of my invention is asfollows:

Assuming that the rear harness 11 is in its upper position and the frontharness 10 is in its extreme lower position, Figure 2, then threads Gand C will form the upper wall of the shed, while threads B and B willform the lower wall. The leno threads A, A are pulled from the left overthe top a of the two sets of threads 13,13 and C, G

and then downwardly to a position substantially parallel with the lowerwall of the shed at the front of the front harness. This forms a passagefor the bobbin 16 which is driven through in the usual manner to lay theweft thread 15. The positions of the .two harnesses are then reversedand the lone threads A, Acontiuue in the lower wall of the shed directlyfrom the rear harness 11, because as the front harness rises theflexible properties of the chain 23 enable it to fall back over thethreads B, B, i. e., to the left or normal.

positions. The bobbin 16 thereafter re turns through the newly formedshed and one complete selvage weave in the'center selvage is tied.

It will be clear that in both positions of harnesses 10 and 11, the lenothreads A, A are always below the weft threads and it is merely thethreads B, B and C, C which alternate to positions first above and thenbelow the weft. Theleno threads A and A cross above the two warp threadsand drop below the weft every pick, first at one side and then at the.other, but when the leno is up at one side the warp thread at the sameside is under the weft. In other words the leno threads always form apart of the lower wall of theshed and the bobbin always travels in apath above the leno thread.

' Having now described my invention what I claim and desire to secure byLetters Patent is:

1. In a center selvage attachment for looms, the combination of a frontand back harness, and a flexible leno guiding means carried by the frontharness and of a length to enable the leno thread to lie in thelowerwall of the shed for every pick.

2. In a center selvage attachment for looms, the combinationof a frontand back harness, and means for guiding a leno thread comprising aflexifile member attached at one end to the lower portion of the frontharness and provided with an opening at the free end to receive the lenothread of the weave, said member being of a length sufficient to enablethe leno thread to lie in the lower wall of the shed for every, pick.

3. A center selvage attachment, comprising a flexible leno guidingmember consisting of a linked chain having its upper portion separatedinto two portions to receive the leno threads of adjacent sclvages,substantially as described.

4. A center selvage attachment for the front harness of a loom,comprising, a Y-shaped fleiiible linked chain having the lower portionfixed to the lower portion of the harness and the free upper endsprovided with means to loosely embrace the leno threads of the loom.

In testimony whereof, I have signed my name to this specification, this7th day of I

